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<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> *  Copyright 2001-2006 Stephen Colebourne</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *  Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *  you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> *  You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *      <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> *  distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> *  See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> *  limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.goda.time;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.io.Serializable;
<a name="19" href="#19">19</a>  
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.goda.time.base.BaseInterval;
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.goda.time.chrono.ISOChronology;
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.goda.time.format.ISODateTimeFormat;
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.goda.time.format.ISOPeriodFormat;
<a name="24" href="#24">24</a>  
<a name="25" href="#25">25</a>  <em class="jxr_javadoccomment">/**</em>
<a name="26" href="#26">26</a>  <em class="jxr_javadoccomment"> * Interval is the standard implementation of an immutable time interval.</em>
<a name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> * A time interval represents a period of time between two instants.</em>
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> * Intervals are inclusive of the start instant and exclusive of the end.</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> * The end instant is always greater than or equal to the start instant.</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * Intervals have a fixed millisecond duration.</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * This is the difference between the start and end instants.</em>
<a name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * The duration is represented separately by {@link ReadableDuration}.</em>
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * As a result, intervals are not comparable.</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * To compare the length of two intervals, you should compare their durations.</em>
<a name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * An interval can also be converted to a {@link ReadablePeriod}.</em>
<a name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * This represents the difference between the start and end points in terms of fields</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * such as years and days.</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * Interval is thread-safe and immutable.</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> *</em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * @author Brian S O'Neill</em>
<a name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * @author Sean Geoghegan</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * @author Stephen Colebourne</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * @author Julen Parra</em>
<a name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * @since 1.0</em>
<a name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> */</em>
<a name="50" href="#50">50</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>
<a name="51" href="#51">51</a>          <strong class="jxr_keyword">extends</strong> <a href="../../../org/goda/time/base/BaseInterval.html">BaseInterval</a>
<a name="52" href="#52">52</a>          implements ReadableInterval, Serializable {
<a name="53" href="#53">53</a>  
<a name="54" href="#54">54</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Serialization version */</em>
<a name="55" href="#55">55</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> serialVersionUID = 4922451897541386752L;
<a name="56" href="#56">56</a>  
<a name="57" href="#57">57</a>      <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="58" href="#58">58</a>      <em class="jxr_javadoccomment">/**</em>
<a name="59" href="#59">59</a>  <em class="jxr_javadoccomment">     * Constructs an interval from a start and end instant with the ISO</em>
<a name="60" href="#60">60</a>  <em class="jxr_javadoccomment">     * default chronology in the default time zone.</em>
<a name="61" href="#61">61</a>  <em class="jxr_javadoccomment">     * </em>
<a name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     * @param startInstant  start of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * @param endInstant  end of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="65" href="#65">65</a>  <em class="jxr_javadoccomment">     */</em>
<a name="66" href="#66">66</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<strong class="jxr_keyword">long</strong> startInstant, <strong class="jxr_keyword">long</strong> endInstant) {
<a name="67" href="#67">67</a>          <strong class="jxr_keyword">super</strong>(startInstant, endInstant, <strong class="jxr_keyword">null</strong>);
<a name="68" href="#68">68</a>      }
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <em class="jxr_javadoccomment">/**</em>
<a name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     * Constructs an interval from a start and end instant with the ISO</em>
<a name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     * default chronology in the specified time zone.</em>
<a name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     * </em>
<a name="74" href="#74">74</a>  <em class="jxr_javadoccomment">     * @param startInstant  start of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="75" href="#75">75</a>  <em class="jxr_javadoccomment">     * @param endInstant  end of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="76" href="#76">76</a>  <em class="jxr_javadoccomment">     * @param zone  the time zone to use, null means default zone</em>
<a name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     * @since 1.5</em>
<a name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     */</em>
<a name="80" href="#80">80</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<strong class="jxr_keyword">long</strong> startInstant, <strong class="jxr_keyword">long</strong> endInstant, <a href="../../../org/goda/time/DateTimeZone.html">DateTimeZone</a> zone) {
<a name="81" href="#81">81</a>          <strong class="jxr_keyword">super</strong>(startInstant, endInstant, ISOChronology.getInstance(zone));
<a name="82" href="#82">82</a>      }
<a name="83" href="#83">83</a>  
<a name="84" href="#84">84</a>      <em class="jxr_javadoccomment">/**</em>
<a name="85" href="#85">85</a>  <em class="jxr_javadoccomment">     * Constructs an interval from a start and end instant with the</em>
<a name="86" href="#86">86</a>  <em class="jxr_javadoccomment">     * specified chronology.</em>
<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     * </em>
<a name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     * @param chronology  the chronology to use, null is ISO default</em>
<a name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     * @param startInstant  start of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     * @param endInstant  end of this interval, as milliseconds from 1970-01-01T00:00:00Z.</em>
<a name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     */</em>
<a name="93" href="#93">93</a>      <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<strong class="jxr_keyword">long</strong> startInstant, <strong class="jxr_keyword">long</strong> endInstant, <a href="../../../org/goda/time/Chronology.html">Chronology</a> chronology) {
<a name="94" href="#94">94</a>          <strong class="jxr_keyword">super</strong>(startInstant, endInstant, chronology);
<a name="95" href="#95">95</a>      }
<a name="96" href="#96">96</a>  
<a name="97" href="#97">97</a>      <em class="jxr_javadoccomment">/**</em>
<a name="98" href="#98">98</a>  <em class="jxr_javadoccomment">     * Constructs an interval from a start and end instant.</em>
<a name="99" href="#99">99</a>  <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="100" href="#100">100</a> <em class="jxr_javadoccomment">     * The chronology used is that of the start instant.</em>
<a name="101" href="#101">101</a> <em class="jxr_javadoccomment">     * </em>
<a name="102" href="#102">102</a> <em class="jxr_javadoccomment">     * @param start  start of this interval, null means now</em>
<a name="103" href="#103">103</a> <em class="jxr_javadoccomment">     * @param end  end of this interval, null means now</em>
<a name="104" href="#104">104</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="105" href="#105">105</a> <em class="jxr_javadoccomment">     */</em>
<a name="106" href="#106">106</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> start, <a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> end) {
<a name="107" href="#107">107</a>         <strong class="jxr_keyword">super</strong>(start, end);
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     <em class="jxr_javadoccomment">/**</em>
<a name="111" href="#111">111</a> <em class="jxr_javadoccomment">     * Constructs an interval from a start instant and a duration.</em>
<a name="112" href="#112">112</a> <em class="jxr_javadoccomment">     * </em>
<a name="113" href="#113">113</a> <em class="jxr_javadoccomment">     * @param start  start of this interval, null means now</em>
<a name="114" href="#114">114</a> <em class="jxr_javadoccomment">     * @param duration  the duration of this interval, null means zero length</em>
<a name="115" href="#115">115</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * @throws ArithmeticException if the end instant exceeds the capacity of a long</em>
<a name="117" href="#117">117</a> <em class="jxr_javadoccomment">     */</em>
<a name="118" href="#118">118</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> start, <a href="../../../org/goda/time/ReadableDuration.html">ReadableDuration</a> duration) {
<a name="119" href="#119">119</a>         <strong class="jxr_keyword">super</strong>(start, duration);
<a name="120" href="#120">120</a>     }
<a name="121" href="#121">121</a> 
<a name="122" href="#122">122</a>     <em class="jxr_javadoccomment">/**</em>
<a name="123" href="#123">123</a> <em class="jxr_javadoccomment">     * Constructs an interval from a millisecond duration and an end instant.</em>
<a name="124" href="#124">124</a> <em class="jxr_javadoccomment">     * </em>
<a name="125" href="#125">125</a> <em class="jxr_javadoccomment">     * @param duration  the duration of this interval, null means zero length</em>
<a name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * @param end  end of this interval, null means now</em>
<a name="127" href="#127">127</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="128" href="#128">128</a> <em class="jxr_javadoccomment">     * @throws ArithmeticException if the start instant exceeds the capacity of a long</em>
<a name="129" href="#129">129</a> <em class="jxr_javadoccomment">     */</em>
<a name="130" href="#130">130</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<a href="../../../org/goda/time/ReadableDuration.html">ReadableDuration</a> duration, <a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> end) {
<a name="131" href="#131">131</a>         <strong class="jxr_keyword">super</strong>(duration, end);
<a name="132" href="#132">132</a>     }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>     <em class="jxr_javadoccomment">/**</em>
<a name="135" href="#135">135</a> <em class="jxr_javadoccomment">     * Constructs an interval from a start instant and a time period.</em>
<a name="136" href="#136">136</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="137" href="#137">137</a> <em class="jxr_javadoccomment">     * When forming the interval, the chronology from the instant is used</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * if present, otherwise the chronology of the period is used.</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * </em>
<a name="140" href="#140">140</a> <em class="jxr_javadoccomment">     * @param start  start of this interval, null means now</em>
<a name="141" href="#141">141</a> <em class="jxr_javadoccomment">     * @param period  the period of this interval, null means zero length</em>
<a name="142" href="#142">142</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="143" href="#143">143</a> <em class="jxr_javadoccomment">     * @throws ArithmeticException if the end instant exceeds the capacity of a long</em>
<a name="144" href="#144">144</a> <em class="jxr_javadoccomment">     */</em>
<a name="145" href="#145">145</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> start, <a href="../../../org/goda/time/ReadablePeriod.html">ReadablePeriod</a> period) {
<a name="146" href="#146">146</a>         <strong class="jxr_keyword">super</strong>(start, period);
<a name="147" href="#147">147</a>     }
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a>     <em class="jxr_javadoccomment">/**</em>
<a name="150" href="#150">150</a> <em class="jxr_javadoccomment">     * Constructs an interval from a time period and an end instant.</em>
<a name="151" href="#151">151</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="152" href="#152">152</a> <em class="jxr_javadoccomment">     * When forming the interval, the chronology from the instant is used</em>
<a name="153" href="#153">153</a> <em class="jxr_javadoccomment">     * if present, otherwise the chronology of the period is used.</em>
<a name="154" href="#154">154</a> <em class="jxr_javadoccomment">     * </em>
<a name="155" href="#155">155</a> <em class="jxr_javadoccomment">     * @param period  the period of this interval, null means zero length</em>
<a name="156" href="#156">156</a> <em class="jxr_javadoccomment">     * @param end  end of this interval, null means now</em>
<a name="157" href="#157">157</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the end is before the start</em>
<a name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * @throws ArithmeticException if the start instant exceeds the capacity of a long</em>
<a name="159" href="#159">159</a> <em class="jxr_javadoccomment">     */</em>
<a name="160" href="#160">160</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(<a href="../../../org/goda/time/ReadablePeriod.html">ReadablePeriod</a> period, <a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> end) {
<a name="161" href="#161">161</a>         <strong class="jxr_keyword">super</strong>(period, end);
<a name="162" href="#162">162</a>     }
<a name="163" href="#163">163</a> 
<a name="164" href="#164">164</a>     <em class="jxr_javadoccomment">/**</em>
<a name="165" href="#165">165</a> <em class="jxr_javadoccomment">     * Constructs a time interval by converting or copying from another object.</em>
<a name="166" href="#166">166</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="167" href="#167">167</a> <em class="jxr_javadoccomment">     * The recognised object types are defined in</em>
<a name="168" href="#168">168</a> <em class="jxr_javadoccomment">     * {@link org.joda.time.convert.ConverterManager ConverterManager} and</em>
<a name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * include ReadableInterval and String.</em>
<a name="170" href="#170">170</a> <em class="jxr_javadoccomment">     * The String formats are described by {@link ISODateTimeFormat#dateTimeParser()}</em>
<a name="171" href="#171">171</a> <em class="jxr_javadoccomment">     * and {@link ISOPeriodFormat#standard()}, and may be 'datetime/datetime',</em>
<a name="172" href="#172">172</a> <em class="jxr_javadoccomment">     * 'datetime/period' or 'period/datetime'.</em>
<a name="173" href="#173">173</a> <em class="jxr_javadoccomment">     * </em>
<a name="174" href="#174">174</a> <em class="jxr_javadoccomment">     * @param interval  the time interval to copy</em>
<a name="175" href="#175">175</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the interval is invalid</em>
<a name="176" href="#176">176</a> <em class="jxr_javadoccomment">     */</em>
<a name="177" href="#177">177</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(Object interval) {
<a name="178" href="#178">178</a>         <strong class="jxr_keyword">super</strong>(interval, <strong class="jxr_keyword">null</strong>);
<a name="179" href="#179">179</a>     }
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>     <em class="jxr_javadoccomment">/**</em>
<a name="182" href="#182">182</a> <em class="jxr_javadoccomment">     * Constructs a time interval by converting or copying from another object,</em>
<a name="183" href="#183">183</a> <em class="jxr_javadoccomment">     * overriding the chronology.</em>
<a name="184" href="#184">184</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="185" href="#185">185</a> <em class="jxr_javadoccomment">     * The recognised object types are defined in</em>
<a name="186" href="#186">186</a> <em class="jxr_javadoccomment">     * {@link org.joda.time.convert.ConverterManager ConverterManager} and</em>
<a name="187" href="#187">187</a> <em class="jxr_javadoccomment">     * include ReadableInterval and String.</em>
<a name="188" href="#188">188</a> <em class="jxr_javadoccomment">     * The String formats are described by {@link ISODateTimeFormat#dateTimeParser()}</em>
<a name="189" href="#189">189</a> <em class="jxr_javadoccomment">     * and {@link ISOPeriodFormat#standard()}, and may be 'datetime/datetime',</em>
<a name="190" href="#190">190</a> <em class="jxr_javadoccomment">     * 'datetime/period' or 'period/datetime'.</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * </em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * @param interval  the time interval to copy</em>
<a name="193" href="#193">193</a> <em class="jxr_javadoccomment">     * @param chronology  the chronology to use, null means ISO default</em>
<a name="194" href="#194">194</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the interval is invalid</em>
<a name="195" href="#195">195</a> <em class="jxr_javadoccomment">     */</em>
<a name="196" href="#196">196</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(Object interval, <a href="../../../org/goda/time/Chronology.html">Chronology</a> chronology) {
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">super</strong>(interval, chronology);
<a name="198" href="#198">198</a>     }
<a name="199" href="#199">199</a> 
<a name="200" href="#200">200</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="201" href="#201">201</a>     <em class="jxr_javadoccomment">/**</em>
<a name="202" href="#202">202</a> <em class="jxr_javadoccomment">     * Get this interval as an immutable &lt;code&gt;Interval&lt;/code&gt; object</em>
<a name="203" href="#203">203</a> <em class="jxr_javadoccomment">     * by returning &lt;code&gt;this&lt;/code&gt;.</em>
<a name="204" href="#204">204</a> <em class="jxr_javadoccomment">     *</em>
<a name="205" href="#205">205</a> <em class="jxr_javadoccomment">     * @return &lt;code&gt;this&lt;/code&gt;</em>
<a name="206" href="#206">206</a> <em class="jxr_javadoccomment">     */</em>
<a name="207" href="#207">207</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> toInterval() {
<a name="208" href="#208">208</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="212" href="#212">212</a>     <em class="jxr_javadoccomment">/**</em>
<a name="213" href="#213">213</a> <em class="jxr_javadoccomment">     * Gets the overlap between this interval and another interval.</em>
<a name="214" href="#214">214</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="215" href="#215">215</a> <em class="jxr_javadoccomment">     * Intervals are inclusive of the start instant and exclusive of the end.</em>
<a name="216" href="#216">216</a> <em class="jxr_javadoccomment">     * An interval overlaps another if it shares some common part of the</em>
<a name="217" href="#217">217</a> <em class="jxr_javadoccomment">     * datetime continuum. This method returns the amount of the overlap,</em>
<a name="218" href="#218">218</a> <em class="jxr_javadoccomment">     * only if the intervals actually do overlap.</em>
<a name="219" href="#219">219</a> <em class="jxr_javadoccomment">     * If the intervals do not overlap, then null is returned.</em>
<a name="220" href="#220">220</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="221" href="#221">221</a> <em class="jxr_javadoccomment">     * When two intervals are compared the result is one of three states:</em>
<a name="222" href="#222">222</a> <em class="jxr_javadoccomment">     * (a) they abut, (b) there is a gap between them, (c) they overlap.</em>
<a name="223" href="#223">223</a> <em class="jxr_javadoccomment">     * The abuts state takes precedence over the other two, thus a zero duration</em>
<a name="224" href="#224">224</a> <em class="jxr_javadoccomment">     * interval at the start of a larger interval abuts and does not overlap.</em>
<a name="225" href="#225">225</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * The chronology of the returned interval is the same as that of</em>
<a name="227" href="#227">227</a> <em class="jxr_javadoccomment">     * this interval (the chronology of the interval parameter is not used).</em>
<a name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * Note that the use of the chronology was only correctly implemented</em>
<a name="229" href="#229">229</a> <em class="jxr_javadoccomment">     * in version 1.3.</em>
<a name="230" href="#230">230</a> <em class="jxr_javadoccomment">     *</em>
<a name="231" href="#231">231</a> <em class="jxr_javadoccomment">     * @param interval  the interval to examine, null means now</em>
<a name="232" href="#232">232</a> <em class="jxr_javadoccomment">     * @return the overlap interval, null if no overlap</em>
<a name="233" href="#233">233</a> <em class="jxr_javadoccomment">     * @since 1.1</em>
<a name="234" href="#234">234</a> <em class="jxr_javadoccomment">     */</em>
<a name="235" href="#235">235</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> overlap(<a href="../../../org/goda/time/ReadableInterval.html">ReadableInterval</a> interval) {
<a name="236" href="#236">236</a>         interval = DateTimeUtils.getReadableInterval(interval);
<a name="237" href="#237">237</a>         <strong class="jxr_keyword">if</strong> (overlaps(interval) == false) {
<a name="238" href="#238">238</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a name="239" href="#239">239</a>         }
<a name="240" href="#240">240</a>         <strong class="jxr_keyword">long</strong> start = Math.max(getStartMillis(), interval.getStartMillis());
<a name="241" href="#241">241</a>         <strong class="jxr_keyword">long</strong> end = Math.min(getEndMillis(), interval.getEndMillis());
<a name="242" href="#242">242</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(start, end, getChronology());
<a name="243" href="#243">243</a>     }
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="246" href="#246">246</a>     <em class="jxr_javadoccomment">/**</em>
<a name="247" href="#247">247</a> <em class="jxr_javadoccomment">     * Gets the gap between this interval and another interval.</em>
<a name="248" href="#248">248</a> <em class="jxr_javadoccomment">     * The other interval can be either before or after this interval.</em>
<a name="249" href="#249">249</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="250" href="#250">250</a> <em class="jxr_javadoccomment">     * Intervals are inclusive of the start instant and exclusive of the end.</em>
<a name="251" href="#251">251</a> <em class="jxr_javadoccomment">     * An interval has a gap to another interval if there is a non-zero</em>
<a name="252" href="#252">252</a> <em class="jxr_javadoccomment">     * duration between them. This method returns the amount of the gap only</em>
<a name="253" href="#253">253</a> <em class="jxr_javadoccomment">     * if the intervals do actually have a gap between them.</em>
<a name="254" href="#254">254</a> <em class="jxr_javadoccomment">     * If the intervals overlap or abut, then null is returned.</em>
<a name="255" href="#255">255</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="256" href="#256">256</a> <em class="jxr_javadoccomment">     * When two intervals are compared the result is one of three states:</em>
<a name="257" href="#257">257</a> <em class="jxr_javadoccomment">     * (a) they abut, (b) there is a gap between them, (c) they overlap.</em>
<a name="258" href="#258">258</a> <em class="jxr_javadoccomment">     * The abuts state takes precedence over the other two, thus a zero duration</em>
<a name="259" href="#259">259</a> <em class="jxr_javadoccomment">     * interval at the start of a larger interval abuts and does not overlap.</em>
<a name="260" href="#260">260</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="261" href="#261">261</a> <em class="jxr_javadoccomment">     * The chronology of the returned interval is the same as that of</em>
<a name="262" href="#262">262</a> <em class="jxr_javadoccomment">     * this interval (the chronology of the interval parameter is not used).</em>
<a name="263" href="#263">263</a> <em class="jxr_javadoccomment">     * Note that the use of the chronology was only correctly implemented</em>
<a name="264" href="#264">264</a> <em class="jxr_javadoccomment">     * in version 1.3.</em>
<a name="265" href="#265">265</a> <em class="jxr_javadoccomment">     *</em>
<a name="266" href="#266">266</a> <em class="jxr_javadoccomment">     * @param interval  the interval to examine, null means now</em>
<a name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * @return the gap interval, null if no gap</em>
<a name="268" href="#268">268</a> <em class="jxr_javadoccomment">     * @since 1.1</em>
<a name="269" href="#269">269</a> <em class="jxr_javadoccomment">     */</em>
<a name="270" href="#270">270</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> gap(<a href="../../../org/goda/time/ReadableInterval.html">ReadableInterval</a> interval) {
<a name="271" href="#271">271</a>         interval = DateTimeUtils.getReadableInterval(interval);
<a name="272" href="#272">272</a>         <strong class="jxr_keyword">long</strong> otherStart = interval.getStartMillis();
<a name="273" href="#273">273</a>         <strong class="jxr_keyword">long</strong> otherEnd = interval.getEndMillis();
<a name="274" href="#274">274</a>         <strong class="jxr_keyword">long</strong> thisStart = getStartMillis();
<a name="275" href="#275">275</a>         <strong class="jxr_keyword">long</strong> thisEnd = getEndMillis();
<a name="276" href="#276">276</a>         <strong class="jxr_keyword">if</strong> (thisStart &gt; otherEnd) {
<a name="277" href="#277">277</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(otherEnd, thisStart, getChronology());
<a name="278" href="#278">278</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (otherStart &gt; thisEnd) {
<a name="279" href="#279">279</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(thisEnd, otherStart, getChronology());
<a name="280" href="#280">280</a>         } <strong class="jxr_keyword">else</strong> {
<a name="281" href="#281">281</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a name="282" href="#282">282</a>         }
<a name="283" href="#283">283</a>     }
<a name="284" href="#284">284</a> 
<a name="285" href="#285">285</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="286" href="#286">286</a>     <em class="jxr_javadoccomment">/**</em>
<a name="287" href="#287">287</a> <em class="jxr_javadoccomment">     * Does this interval abut with the interval specified.</em>
<a name="288" href="#288">288</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="289" href="#289">289</a> <em class="jxr_javadoccomment">     * Intervals are inclusive of the start instant and exclusive of the end.</em>
<a name="290" href="#290">290</a> <em class="jxr_javadoccomment">     * An interval abuts if it starts immediately after, or ends immediately</em>
<a name="291" href="#291">291</a> <em class="jxr_javadoccomment">     * before this interval without overlap.</em>
<a name="292" href="#292">292</a> <em class="jxr_javadoccomment">     * A zero duration interval abuts with itself.</em>
<a name="293" href="#293">293</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="294" href="#294">294</a> <em class="jxr_javadoccomment">     * When two intervals are compared the result is one of three states:</em>
<a name="295" href="#295">295</a> <em class="jxr_javadoccomment">     * (a) they abut, (b) there is a gap between them, (c) they overlap.</em>
<a name="296" href="#296">296</a> <em class="jxr_javadoccomment">     * The abuts state takes precedence over the other two, thus a zero duration</em>
<a name="297" href="#297">297</a> <em class="jxr_javadoccomment">     * interval at the start of a larger interval abuts and does not overlap.</em>
<a name="298" href="#298">298</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a name="299" href="#299">299</a> <em class="jxr_javadoccomment">     * For example:</em>
<a name="300" href="#300">300</a> <em class="jxr_javadoccomment">     * &lt;pre&gt;</em>
<a name="301" href="#301">301</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [08:00 to 08:30)  = false (completely before)</em>
<a name="302" href="#302">302</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [08:00 to 09:00)  = true</em>
<a name="303" href="#303">303</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [08:00 to 09:01)  = false (overlaps)</em>
<a name="304" href="#304">304</a> <em class="jxr_javadoccomment">     * </em>
<a name="305" href="#305">305</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [09:00 to 09:00)  = true</em>
<a name="306" href="#306">306</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [09:00 to 09:01)  = false (overlaps)</em>
<a name="307" href="#307">307</a> <em class="jxr_javadoccomment">     * </em>
<a name="308" href="#308">308</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [10:00 to 10:00)  = true</em>
<a name="309" href="#309">309</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [10:00 to 10:30)  = true</em>
<a name="310" href="#310">310</a> <em class="jxr_javadoccomment">     * </em>
<a name="311" href="#311">311</a> <em class="jxr_javadoccomment">     * [09:00 to 10:00) abuts [10:30 to 11:00)  = false (completely after)</em>
<a name="312" href="#312">312</a> <em class="jxr_javadoccomment">     * </em>
<a name="313" href="#313">313</a> <em class="jxr_javadoccomment">     * [14:00 to 14:00) abuts [14:00 to 14:00)  = true</em>
<a name="314" href="#314">314</a> <em class="jxr_javadoccomment">     * [14:00 to 14:00) abuts [14:00 to 15:00)  = true</em>
<a name="315" href="#315">315</a> <em class="jxr_javadoccomment">     * [14:00 to 14:00) abuts [13:00 to 14:00)  = true</em>
<a name="316" href="#316">316</a> <em class="jxr_javadoccomment">     * &lt;/pre&gt;</em>
<a name="317" href="#317">317</a> <em class="jxr_javadoccomment">     *</em>
<a name="318" href="#318">318</a> <em class="jxr_javadoccomment">     * @param interval  the interval to examine, null means now</em>
<a name="319" href="#319">319</a> <em class="jxr_javadoccomment">     * @return true if the interval abuts</em>
<a name="320" href="#320">320</a> <em class="jxr_javadoccomment">     * @since 1.1</em>
<a name="321" href="#321">321</a> <em class="jxr_javadoccomment">     */</em>
<a name="322" href="#322">322</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> abuts(<a href="../../../org/goda/time/ReadableInterval.html">ReadableInterval</a> interval) {
<a name="323" href="#323">323</a>         <strong class="jxr_keyword">if</strong> (interval == <strong class="jxr_keyword">null</strong>) {
<a name="324" href="#324">324</a>             <strong class="jxr_keyword">long</strong> now = DateTimeUtils.currentTimeMillis();
<a name="325" href="#325">325</a>             <strong class="jxr_keyword">return</strong> (getStartMillis() == now || getEndMillis() == now);
<a name="326" href="#326">326</a>         } <strong class="jxr_keyword">else</strong> {
<a name="327" href="#327">327</a>             <strong class="jxr_keyword">return</strong> (interval.getEndMillis() == getStartMillis() ||
<a name="328" href="#328">328</a>                     getEndMillis() == interval.getStartMillis());
<a name="329" href="#329">329</a>         }
<a name="330" href="#330">330</a>     }
<a name="331" href="#331">331</a> 
<a name="332" href="#332">332</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="333" href="#333">333</a>     <em class="jxr_javadoccomment">/**</em>
<a name="334" href="#334">334</a> <em class="jxr_javadoccomment">     * Creates a new interval with the same start and end, but a different chronology.</em>
<a name="335" href="#335">335</a> <em class="jxr_javadoccomment">     *</em>
<a name="336" href="#336">336</a> <em class="jxr_javadoccomment">     * @param chronology  the chronology to use, null means ISO default</em>
<a name="337" href="#337">337</a> <em class="jxr_javadoccomment">     * @return an interval with a different chronology</em>
<a name="338" href="#338">338</a> <em class="jxr_javadoccomment">     */</em>
<a name="339" href="#339">339</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withChronology(<a href="../../../org/goda/time/Chronology.html">Chronology</a> chronology) {
<a name="340" href="#340">340</a>         <strong class="jxr_keyword">if</strong> (getChronology() == chronology) {
<a name="341" href="#341">341</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="342" href="#342">342</a>         }
<a name="343" href="#343">343</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(getStartMillis(), getEndMillis(), chronology);
<a name="344" href="#344">344</a>     }
<a name="345" href="#345">345</a> 
<a name="346" href="#346">346</a>     <em class="jxr_javadoccomment">/**</em>
<a name="347" href="#347">347</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified start millisecond instant.</em>
<a name="348" href="#348">348</a> <em class="jxr_javadoccomment">     *</em>
<a name="349" href="#349">349</a> <em class="jxr_javadoccomment">     * @param startInstant  the start instant for the new interval</em>
<a name="350" href="#350">350</a> <em class="jxr_javadoccomment">     * @return an interval with the end from this interval and the specified start</em>
<a name="351" href="#351">351</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the resulting interval has end before start</em>
<a name="352" href="#352">352</a> <em class="jxr_javadoccomment">     */</em>
<a name="353" href="#353">353</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withStartMillis(<strong class="jxr_keyword">long</strong> startInstant) {
<a name="354" href="#354">354</a>         <strong class="jxr_keyword">if</strong> (startInstant == getStartMillis()) {
<a name="355" href="#355">355</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="356" href="#356">356</a>         }
<a name="357" href="#357">357</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(startInstant, getEndMillis(), getChronology());
<a name="358" href="#358">358</a>     }
<a name="359" href="#359">359</a> 
<a name="360" href="#360">360</a>     <em class="jxr_javadoccomment">/**</em>
<a name="361" href="#361">361</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified start instant.</em>
<a name="362" href="#362">362</a> <em class="jxr_javadoccomment">     *</em>
<a name="363" href="#363">363</a> <em class="jxr_javadoccomment">     * @param start  the start instant for the new interval, null means now</em>
<a name="364" href="#364">364</a> <em class="jxr_javadoccomment">     * @return an interval with the end from this interval and the specified start</em>
<a name="365" href="#365">365</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the resulting interval has end before start</em>
<a name="366" href="#366">366</a> <em class="jxr_javadoccomment">     */</em>
<a name="367" href="#367">367</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withStart(<a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> start) {
<a name="368" href="#368">368</a>         <strong class="jxr_keyword">long</strong> startMillis = DateTimeUtils.getInstantMillis(start);
<a name="369" href="#369">369</a>         <strong class="jxr_keyword">return</strong> withStartMillis(startMillis);
<a name="370" href="#370">370</a>     }
<a name="371" href="#371">371</a> 
<a name="372" href="#372">372</a>     <em class="jxr_javadoccomment">/**</em>
<a name="373" href="#373">373</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified start millisecond instant.</em>
<a name="374" href="#374">374</a> <em class="jxr_javadoccomment">     *</em>
<a name="375" href="#375">375</a> <em class="jxr_javadoccomment">     * @param endInstant  the end instant for the new interval</em>
<a name="376" href="#376">376</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and the specified end</em>
<a name="377" href="#377">377</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the resulting interval has end before start</em>
<a name="378" href="#378">378</a> <em class="jxr_javadoccomment">     */</em>
<a name="379" href="#379">379</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withEndMillis(<strong class="jxr_keyword">long</strong> endInstant) {
<a name="380" href="#380">380</a>         <strong class="jxr_keyword">if</strong> (endInstant == getEndMillis()) {
<a name="381" href="#381">381</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="382" href="#382">382</a>         }
<a name="383" href="#383">383</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(getStartMillis(), endInstant, getChronology());
<a name="384" href="#384">384</a>     }
<a name="385" href="#385">385</a> 
<a name="386" href="#386">386</a>     <em class="jxr_javadoccomment">/**</em>
<a name="387" href="#387">387</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified end instant.</em>
<a name="388" href="#388">388</a> <em class="jxr_javadoccomment">     *</em>
<a name="389" href="#389">389</a> <em class="jxr_javadoccomment">     * @param end  the end instant for the new interval, null means now</em>
<a name="390" href="#390">390</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and the specified end</em>
<a name="391" href="#391">391</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the resulting interval has end before start</em>
<a name="392" href="#392">392</a> <em class="jxr_javadoccomment">     */</em>
<a name="393" href="#393">393</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withEnd(<a href="../../../org/goda/time/ReadableInstant.html">ReadableInstant</a> end) {
<a name="394" href="#394">394</a>         <strong class="jxr_keyword">long</strong> endMillis = DateTimeUtils.getInstantMillis(end);
<a name="395" href="#395">395</a>         <strong class="jxr_keyword">return</strong> withEndMillis(endMillis);
<a name="396" href="#396">396</a>     }
<a name="397" href="#397">397</a> 
<a name="398" href="#398">398</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="399" href="#399">399</a>     <em class="jxr_javadoccomment">/**</em>
<a name="400" href="#400">400</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified duration after the start instant.</em>
<a name="401" href="#401">401</a> <em class="jxr_javadoccomment">     *</em>
<a name="402" href="#402">402</a> <em class="jxr_javadoccomment">     * @param duration  the duration to add to the start to get the new end instant, null means zero</em>
<a name="403" href="#403">403</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and a calculated end</em>
<a name="404" href="#404">404</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the duration is negative</em>
<a name="405" href="#405">405</a> <em class="jxr_javadoccomment">     */</em>
<a name="406" href="#406">406</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withDurationAfterStart(<a href="../../../org/goda/time/ReadableDuration.html">ReadableDuration</a> duration) {
<a name="407" href="#407">407</a>         <strong class="jxr_keyword">long</strong> durationMillis = DateTimeUtils.getDurationMillis(duration);
<a name="408" href="#408">408</a>         <strong class="jxr_keyword">if</strong> (durationMillis == toDurationMillis()) {
<a name="409" href="#409">409</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="410" href="#410">410</a>         }
<a name="411" href="#411">411</a>         <a href="../../../org/goda/time/Chronology.html">Chronology</a> chrono = getChronology();
<a name="412" href="#412">412</a>         <strong class="jxr_keyword">long</strong> startMillis = getStartMillis();
<a name="413" href="#413">413</a>         <strong class="jxr_keyword">long</strong> endMillis = chrono.add(startMillis, durationMillis, 1);
<a name="414" href="#414">414</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(startMillis, endMillis, chrono);
<a name="415" href="#415">415</a>     }
<a name="416" href="#416">416</a> 
<a name="417" href="#417">417</a>     <em class="jxr_javadoccomment">/**</em>
<a name="418" href="#418">418</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified duration before the end instant.</em>
<a name="419" href="#419">419</a> <em class="jxr_javadoccomment">     *</em>
<a name="420" href="#420">420</a> <em class="jxr_javadoccomment">     * @param duration  the duration to add to the start to get the new end instant, null means zero</em>
<a name="421" href="#421">421</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and a calculated end</em>
<a name="422" href="#422">422</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the duration is negative</em>
<a name="423" href="#423">423</a> <em class="jxr_javadoccomment">     */</em>
<a name="424" href="#424">424</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withDurationBeforeEnd(<a href="../../../org/goda/time/ReadableDuration.html">ReadableDuration</a> duration) {
<a name="425" href="#425">425</a>         <strong class="jxr_keyword">long</strong> durationMillis = DateTimeUtils.getDurationMillis(duration);
<a name="426" href="#426">426</a>         <strong class="jxr_keyword">if</strong> (durationMillis == toDurationMillis()) {
<a name="427" href="#427">427</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
<a name="428" href="#428">428</a>         }
<a name="429" href="#429">429</a>         <a href="../../../org/goda/time/Chronology.html">Chronology</a> chrono = getChronology();
<a name="430" href="#430">430</a>         <strong class="jxr_keyword">long</strong> endMillis = getEndMillis();
<a name="431" href="#431">431</a>         <strong class="jxr_keyword">long</strong> startMillis = chrono.add(endMillis, durationMillis, -1);
<a name="432" href="#432">432</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(startMillis, endMillis, chrono);
<a name="433" href="#433">433</a>     }
<a name="434" href="#434">434</a> 
<a name="435" href="#435">435</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="436" href="#436">436</a>     <em class="jxr_javadoccomment">/**</em>
<a name="437" href="#437">437</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified period after the start instant.</em>
<a name="438" href="#438">438</a> <em class="jxr_javadoccomment">     *</em>
<a name="439" href="#439">439</a> <em class="jxr_javadoccomment">     * @param period  the period to add to the start to get the new end instant, null means zero</em>
<a name="440" href="#440">440</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and a calculated end</em>
<a name="441" href="#441">441</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the period is negative</em>
<a name="442" href="#442">442</a> <em class="jxr_javadoccomment">     */</em>
<a name="443" href="#443">443</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withPeriodAfterStart(<a href="../../../org/goda/time/ReadablePeriod.html">ReadablePeriod</a> period) {
<a name="444" href="#444">444</a>         <strong class="jxr_keyword">if</strong> (period == <strong class="jxr_keyword">null</strong>) {
<a name="445" href="#445">445</a>             <strong class="jxr_keyword">return</strong> withDurationAfterStart(<strong class="jxr_keyword">null</strong>);
<a name="446" href="#446">446</a>         }
<a name="447" href="#447">447</a>         <a href="../../../org/goda/time/Chronology.html">Chronology</a> chrono = getChronology();
<a name="448" href="#448">448</a>         <strong class="jxr_keyword">long</strong> startMillis = getStartMillis();
<a name="449" href="#449">449</a>         <strong class="jxr_keyword">long</strong> endMillis = chrono.add(period, startMillis, 1);
<a name="450" href="#450">450</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(startMillis, endMillis, chrono);
<a name="451" href="#451">451</a>     }
<a name="452" href="#452">452</a> 
<a name="453" href="#453">453</a>     <em class="jxr_javadoccomment">/**</em>
<a name="454" href="#454">454</a> <em class="jxr_javadoccomment">     * Creates a new interval with the specified period before the end instant.</em>
<a name="455" href="#455">455</a> <em class="jxr_javadoccomment">     *</em>
<a name="456" href="#456">456</a> <em class="jxr_javadoccomment">     * @param period  the period to add to the start to get the new end instant, null means zero</em>
<a name="457" href="#457">457</a> <em class="jxr_javadoccomment">     * @return an interval with the start from this interval and a calculated end</em>
<a name="458" href="#458">458</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the period is negative</em>
<a name="459" href="#459">459</a> <em class="jxr_javadoccomment">     */</em>
<a name="460" href="#460">460</a>     <strong class="jxr_keyword">public</strong> <a href="../../../org/goda/time/Interval.html">Interval</a> withPeriodBeforeEnd(<a href="../../../org/goda/time/ReadablePeriod.html">ReadablePeriod</a> period) {
<a name="461" href="#461">461</a>         <strong class="jxr_keyword">if</strong> (period == <strong class="jxr_keyword">null</strong>) {
<a name="462" href="#462">462</a>             <strong class="jxr_keyword">return</strong> withDurationBeforeEnd(<strong class="jxr_keyword">null</strong>);
<a name="463" href="#463">463</a>         }
<a name="464" href="#464">464</a>         <a href="../../../org/goda/time/Chronology.html">Chronology</a> chrono = getChronology();
<a name="465" href="#465">465</a>         <strong class="jxr_keyword">long</strong> endMillis = getEndMillis();
<a name="466" href="#466">466</a>         <strong class="jxr_keyword">long</strong> startMillis = chrono.add(period, endMillis, -1);
<a name="467" href="#467">467</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/goda/time/Interval.html">Interval</a>(startMillis, endMillis, chrono);
<a name="468" href="#468">468</a>     }
<a name="469" href="#469">469</a> 
<a name="470" href="#470">470</a> }
</pre>
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